1/* MN10300 On-chip serial port driver definitions
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
10 */
11#ifndef _MN10300_SERIAL_H
12#define _MN10300_SERIAL_H
13
14#ifndef __ASSEMBLY__
15#include <linux/serial_core.h>
16#include <linux/termios.h>
17#endif
18
19#include <asm/page.h>
20#include <asm/serial-regs.h>
21
22#define NR_PORTS		3		/* should be set 3 or 9 or 16 */
23
24#define MNSC_BUFFER_SIZE	+(PAGE_SIZE / 2)
25
26/* intr_flags bits */
27#define MNSCx_RX_AVAIL		0x01
28#define MNSCx_RX_OVERF		0x02
29#define MNSCx_TX_SPACE		0x04
30#define MNSCx_TX_EMPTY		0x08
31
32/* tx_flags bits */
33#define MNSCx_TX_BREAK		0x01
34#define MNSCx_TX_STOP		0x02
35
36#ifndef __ASSEMBLY__
37
38struct mn10300_serial_port {
39	char			*rx_buffer;	/* reception buffer base */
40	unsigned		rx_inp;		/* pointer to rx input offset */
41	unsigned		rx_outp;	/* pointer to rx output offset */
42	u8			tx_xchar;	/* high-priority XON/XOFF buffer */
43	u8			tx_flags;	/* transmit break/stop request */
44	u8			intr_flags;	/* interrupt flags */
45	volatile u16		*rx_icr;	/* Rx interrupt control register */
46	volatile u16		*tx_icr;	/* Tx interrupt control register */
47	int			rx_irq;		/* reception IRQ */
48	int			tx_irq;		/* transmission IRQ */
49	int			tm_irq;		/* timer IRQ */
50
51	const char		*name;		/* name of serial port */
52	const char		*rx_name;	/* Rx interrupt handler name of serial port */
53	const char		*tx_name;	/* Tx interrupt handler name of serial port */
54	const char		*tm_name;	/* Timer interrupt handler name */
55	unsigned short		type;		/* type of serial port */
56	unsigned char		isconsole;	/* T if it's a console */
57	volatile void		*_iobase;	/* pointer to base of I/O control regs */
58	volatile u16		*_control;	/* control register pointer */
59	volatile u8		*_status;	/* status register pointer */
60	volatile u8		*_intr;		/* interrupt register pointer */
61	volatile u8		*_rxb;		/* receive buffer register pointer */
62	volatile u8		*_txb;		/* transmit buffer register pointer */
63	volatile u16		*_tmicr;	/* timer interrupt control register */
64	volatile u8		*_tmxmd;	/* baud rate timer mode register */
65	volatile u16		*_tmxbr;	/* baud rate timer base register */
66
67	/* this must come down here so that assembly can use BSET to access the
68	 * above fields */
69	struct uart_port	uart;
70
71	unsigned short		rx_brk;		/* current break reception status */
72	u16			tx_cts;		/* current CTS status */
73	int			gdbstub;	/* preemptively stolen by GDB stub */
74
75	u8			clock_src;	/* clock source */
76#define MNSCx_CLOCK_SRC_IOCLK	0
77#define MNSCx_CLOCK_SRC_IOBCLK	1
78
79	u8			div_timer;	/* timer used as divisor */
80#define MNSCx_DIV_TIMER_16BIT	0
81#define MNSCx_DIV_TIMER_8BIT	1
82
83	u16			options;	/* options */
84#define MNSCx_OPT_CTS		0x0001
85
86	unsigned long		ioclk;		/* base clock rate */
87};
88
89#ifdef CONFIG_MN10300_TTYSM0
90extern struct mn10300_serial_port mn10300_serial_port_sif0;
91#endif
92
93#ifdef CONFIG_MN10300_TTYSM1
94extern struct mn10300_serial_port mn10300_serial_port_sif1;
95#endif
96
97#ifdef CONFIG_MN10300_TTYSM2
98extern struct mn10300_serial_port mn10300_serial_port_sif2;
99#endif
100
101extern struct mn10300_serial_port *mn10300_serial_ports[];
102
103struct mn10300_serial_int {
104	struct mn10300_serial_port *port;
105	asmlinkage void (*vdma)(void);
106};
107
108extern struct mn10300_serial_int mn10300_serial_int_tbl[];
109
110extern asmlinkage void mn10300_serial_vdma_interrupt(void);
111extern asmlinkage void mn10300_serial_vdma_rx_handler(void);
112extern asmlinkage void mn10300_serial_vdma_tx_handler(void);
113
114#endif /* __ASSEMBLY__ */
115
116#if defined(CONFIG_GDBSTUB_ON_TTYSM0)
117#define SCgSTR SC0STR
118#define SCgRXB SC0RXB
119#define SCgRXIRQ SC0RXIRQ
120#elif defined(CONFIG_GDBSTUB_ON_TTYSM1)
121#define SCgSTR SC1STR
122#define SCgRXB SC1RXB
123#define SCgRXIRQ SC1RXIRQ
124#elif defined(CONFIG_GDBSTUB_ON_TTYSM2)
125#define SCgSTR SC2STR
126#define SCgRXB SC2RXB
127#define SCgRXIRQ SC2RXIRQ
128#endif
129
130#endif /* _MN10300_SERIAL_H */
131